16 



bright, sunshiny days, when it will dry ofif quickly, and care 

 should be taken to maintain suitable moisture conditions of the 

 air during the night. 



We have grown crops of tomatoes under glass every month 

 in the year, and tind that if proper attention is given to moisture, 



Fig. 3, showing tomato leaf affected with 

 mildew or scab (Cladosporium). 



ventilation and light one need have little fear of tomato mildew 

 under glass. 



SLEEPING DISEASE OR WILT 

 (Fusarium Lycopersici, Sacc.) 



This trouble has been described by G. P. Clinton^, who has 

 noted its appearance on greenhouse tomatoes and who states that 

 the disease does not usually show itself until the plants have 

 attained full size and begun to bloom. 



He characterizes the disease as follows : "At first a lower 

 leaf or two will wilt, turn yellow and finally die. Gradually 

 the disease works up, successive leaves drying up and dying on 

 the vines." Microscopical examination shows a discoloration of 

 the vascular bundles of the leaf petioles and stems, which are 

 more or less filled with the mycelium of the fungus. This 

 causes a clogging of the vessels and interferes with the trans- 

 ference of water, resulting in wilting. Dr. Clinton surmises 

 that the fungus infects the plant through the soil, and that 

 sterilization might succeed in preventing infection. 



During the past few years a similar trouble has been noted 

 in many greenhouses, causing more or less serious trouble. In 

 several instances Fusarium has been observed by us, affecting 



1. Conn. Agr. Sta., 27th Ann. Kept., 1903, p. 366. 



